you can try google adsence to earn alittle extra income and maybe Google would be sending you a little more traffic.
however combining the content for your blogs does not sound a very good idea to me.
just get more organic / natural links from relevant websites and you should get good traffic. Try social bookmarking websites.
Do not look at
PR, it is just for entertainment purposes. It does carry it value, but having 0
PR does not mean that your website will get no traffic from google.